Sound propagates through a medium at a finite speed. The sound of a thunder is heard a little later than the flash of light is seen. So, we can make out that sound travels with a speed which is much less than the speed of light. The speed of sound depends on the properties of …
Sonic boom: When the speed of any object exceeds the speed of sound it is said to be travelling at supersonic speed. Bullets, jet aircrafts etc. often travel at supersonic speeds. When a sound, producing source moves with a speed higher than that of sound, it produces shock waves in air.These shock waves carry a …
Solution:Given,Frequency, ν = 2 kHz = 2000 HzWavelength, λ = 35 cm = 0.35 mWe know that speed, v of the wave= wavelength × frequencyv = λ ν= 0.35 m × 2000 Hz = 700 m/s The time taken by the wave to travel adistance, d of 1.5 km is t = d / v …
Characteristics of a sound wave Sound waves have following characteristics:(1) Amplitude(2) wavelength(3) Frequency(4) Time period (5)Velocity Amplitude. The maximum displacement of each particle from its mean position is called amplitude.It is denoted by A.Its SI unit is metre (m). Its CGS unit is Centimeter (cm) Wavelength The distance between two nearest (adjacent) crests or troughs of a wave is called …
The regions where the coils become closer are called compressions (C) and the regions where the coils are further apart are calledrarefactions (R). As we already know, sound propagates in the medium as a series of compressions and rarefactions. Now, we can compare the propagation of disturbance in a slinky with the sound propagation in …
Sound is a mechanical wave and needs a material medium like air, water, steel etc. for its propagation. It cannot travel throughvacuum, which can be demonstrated by the following experiment. Take an electric bell and an airtight glass bell jar. The electric bell is suspended inside the airtight bell jar. The bell jar is connected …
Sound is produced by vibrating objects. The matter or substance through which sound is transmitted is called a medium. It can be solid, liquid or gas. Sound moves through a medium from the point of generation to the listener. When an object vibrates, it sets the particles of the medium around it vibrating. Sound Definitions …
In the above activities we have produced sound by striking the tuning fork. We can also produce sound by plucking, scratching, rubbing, blowing or shaking different objects.As per the above activities, We set the objects vibrating and produce sound. Vibration means a kind of rapid to and fro motion of an object. The sound of …
Take a tin-can. Remove both ends to make it a hollow cylinder. Take a balloon and stretch it over the can, then wrap a rubber band around the balloon. Take a small piece of mirror. Use a drop of glue to stick the piece of mirror to the balloon. Allow the light through a slit …
Hearing Aid: People with hearing loss may need a hearing aid. A hearing aid is an electronic, battery operated device. The hearing aid receives sound through amicrophone. The microphone converts the sound waves to electrical signals. These electrical signals are amplified by an amplifier. The amplified electrical signals are given to a speaker of the …
